On CBS, The Big Bang Theory matched its series high with a 6.0 adults 18-49 rating up 11% from a 5.4 on December 13. Two and a Half Men earned a season high 4.6 among adults 18-49 up 12% from a 4.1 on December 13. Person Of Interest equaled its series high with a 3.4 adults 18-49 rating up 17% from a 2.9 on December 13. Elementary notched a 2.5 adults 18-49 rating up 9% from a 2.3 on December 13.